EP0094660A1 - Local area network for high transmission rates - Google Patents

Local area network for high transmission rates Download PDF

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EP0094660A1
EP0094660A1 EP83104781A EP83104781A EP0094660A1 EP 0094660 A1 EP0094660 A1 EP 0094660A1 EP 83104781 A EP83104781 A EP 83104781A EP 83104781 A EP83104781 A EP 83104781A EP 0094660 A1 EP0094660 A1 EP 0094660A1
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line
stations
local network
message
station
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EP0094660B1 (en
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Helmut Dr.-Ing. Martin
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/427—Loop networks with decentralised control
    • H04L12/433—Loop networks with decentralised control with asynchronous transmission, e.g. token ring, register insertion

Definitions

  • Ethernet baseband system
  • Analog systems that work in frequency multiplication are on the one hand more powerful, on the other hand, a higher-level control must take place. Furthermore, analog systems are likely to have only a temporary meaning.
  • Ring systems on the other hand, which work according to the time slot method, only allow a limited number of stations, which in turn means that the transmission possibility of the network cannot be fully exploited. In the case of ring systems which are separated at the stations and which are coupled via checking microprocessors, the number of stations is not limited, but they work more slowly as a result of the coupling by active units and are very sensitive to the failure of individual stations.
  • This string is also the request to send.
  • a sequence of pulses must be set immediately in 2., since otherwise one of the next stations recognizes the dialing tone and in turn begins to send a message. Recognizing the leisure time chens by at least one zero bit following the end of message character and the transmission of L bits immediately following the end of message character is made possible by the delay line, which must be longer than one bit due to the response time of the check logic. - By means of the delay line in close cooperation between the receiving device, the test logic and the transmitting device, it is possible that the station that is passively connected to the line can convert the received dial tone into a busy signal before leaving the station area and the prepared message is sent immediately afterwards so that it can be sent in turn to complete with the dial tone.
  • the messages that are joined together in the main transmission direction spread in the direction of both line ends. On the one hand, they run forwards in the main transmission direction in the chronological order of the message series and, on the other hand, separated backwards in time towards the main station due to the spatial extent. This ensures that all messages reach all stations.
  • regenerators In the case of extensive networks and greater attenuation, it may be necessary to connect regenerators to the cable run. To receive the messages that are determined in the message cycle of nambaur stations earlier lying stations regenerators have to reverse their direction of action immediately after passing the message series. Switching back to the main transmission direction takes place immediately after the arrival of the next start bit / sequence or by means of a correspondingly agreed symbol of the last reporting point on the line.
  • the data line or the divided ring can also be supplemented by a second, identically constructed, parallel cable, the first cable being used as the transmitting cable and the second cable as the receiving cable.
  • This offers the advantage that all messages intended for the station can be taken from the complete series of messages that the receive line traverses, which results in better word synchronization and thus higher data transmission security.
  • the receiving device in the transmission line only has the task, if necessary, i.e. in the case of a prepared message, to recognize the dial tone and to give the command for sending the busy signal and sending the message. If a cable malfunctions, operation can be carried out via the undisturbed cable.
  • synchronous processing is required throughout the entire local network, which can be achieved by forming either a split ring or a double cable line and sending out the bit and word clocks from the main station during the breaks.
  • the network is set up with glass fibers
  • Components of the integrated optics can advantageously be used for coupling and coupling as well as for the delay line, Hi h and return lines of the line can be routed in a glass fiber over different wavelengths.
  • the invention provides that a fully synchronized local network with glass fibers is built up from components of the integrated optics, with only one transmitter, namely the main station, which continuously sends out bit series. In the stations, the bit stream becomes a data stream in which 'L bits are allowed to pass through and the zero bits are generated by deletion, which can be achieved, for example, in components of the integrated optics by rotating the polarization plane.
  • the word clock is transmitted in accordance with the invention in that after the transmission of, for example, 16 bits, which can be changed as described, the main station adds an unchangeable zero bit for identifying, for example, a double word. This measure only slightly reduces the data throughput, the entire processing is synchronized, stabilized and accelerated.

Abstract

1. Local area network for transmitting digital data, consisting of a line (1) of arbitrary length in the form of a line or of a split ring which contains metallic conductors or a glass fibre, which displays a main station (2) and to which stations (4) are connected between which the digital data are directly transmitted and each of which displays a receiving facility (E) and a transmitting facility (S), in which the data are transmitted in the main transmitting direction by means of series of messages, originating from the main station (2), consisting of messages directly adjoining each other in time which have, at the start of message and at the end of message, bit sequences which can be detected by all stations, characterized in that - the stations (4) are passively coupled to the line (1), the line (1) not being interrupted by the coupling of the stations (4), - at each station (4) the receiving facility (E) and the transmitting facility (S) are separately coupled to the line (1), and - the section of the line (1) located between the receiving facility (E) and the transmitting facility (S) of each station (4) is of such a length that the messages or message series are displaced by at least one bit between the two facilities.

Description

Lokale Netzwerke gewinnen zunehmend an Bedeutung, da sie für die Übertragung aller Daten im Bürobereich - zwischen Büros und Rechenanlagen, zwischen verschiedenen Rechenanlagen,zwi- sehen Rechenanlagen und ihren peripheren Einheiten, zwischen den Büros selbst - einschließlich Sprache und Bild vorgesehen werden. Es sind Lösungen bekannt geworden mit unterschiedlichstem Netzaufbau, z.B. Stern-, Linien- und Ringnetz. Die Stationen sind passiv an oder aktiv über Mikroprozessoren in einen Leitungszug eingeschaltet. Bei dem sogenannten Ethernet (Basisbandsystem), das digital arbeitet und aus mehreren mit Stationen besetzten Linien besteht, die an beliebigen Stellen untereinander über Regeneratoren verbunden werden können, sind Meldungen der Stationen jederzeit absetzbar, wenn keine andere Station sendet. Bei stärkerem Verkehr kann es zu Kollisionen kommen, was Meldungswiederholungen auslöst. Die Ethernets sind in ihrer räumlichen Ausdehnung sowie in der Datenübertragungsrate begrenzt, und bei sehr starker Belastung kann es zu Verkehrszusammenbrüchen kommen. Anlaloge Systeme, die im Frequenzvielfach arbeiten (Breitbandsysteme), sind einerseits leistungsfähiger, andererseits muß eine übergeordnete Steuerung erfolgen. Ferner dürften analoge Systeme nur noch eine zeitlich begrenzte Bedeutung besitzen. Ringsysteme wiederum, die nach dem Zeitschlitzverfahren arbeiten,lassen nur eine begrenzte Zahl von Stationen zu, wodurch die Übertragungsmöglichkeit des Netzes wiederum nicht voll ausgenutzt werden kann. Bei Ringsystemen, die an den Stationen aufgetrennt sind und die Kopplung über aufprüfende Mikroprozessoren erfolgt, ist die Anzahl der Stationen zwar nicht begrenzt, sie arbeiten jedoch langsamer infolge der Kopplung durch aktive Einheiten und sind sehr empfindlich gegen den Ausfall einzelner Stationen.Local networks are becoming increasingly important because they are intended for the transmission of all data in the office area - between offices and computer systems, between different computer systems, between computer systems and their peripheral units, between the offices themselves - including speech and images. Solutions with different network structures have become known, e.g. Star, line and ring network. The stations are switched on passively or actively via microprocessors in a cable train. With the so-called Ethernet (baseband system), which works digitally and consists of several lines with stations that can be connected to each other at any point via regenerators, messages from the stations can be issued at any time if no other station is transmitting. With heavy traffic, collisions can occur, which triggers repeated messages. The Ethernets are limited in their spatial extent and in the data transmission rate, and traffic collapses can occur with very heavy loads. Analog systems that work in frequency multiplication (broadband systems) are on the one hand more powerful, on the other hand, a higher-level control must take place. Furthermore, analog systems are likely to have only a temporary meaning. Ring systems, on the other hand, which work according to the time slot method, only allow a limited number of stations, which in turn means that the transmission possibility of the network cannot be fully exploited. In the case of ring systems which are separated at the stations and which are coupled via checking microprocessors, the number of stations is not limited, but they work more slowly as a result of the coupling by active units and are very sensitive to the failure of individual stations.

Die geschilderten Nachteile der bekanntgewordenen Systeme wie die begrenzte Zahl der Stationen, die begrenzte Größe bzw. Ausdehnung, die begrenzte Datenübertragungsrate, die Empfindlichkeit gegen den Ausfall von nur einer Station des gesamten Netzes werden durch die Erfindung dadurch vermieden, daß die Stationen mit ihren Sende- und Empfangseinrichtungen passiv an eine nahezu beliebig lange Leitung in Form einer Linie oder eines geteilten Ringes (s. Abb. 1.) aus metallischen Leitern oder einer Glasfaser lose angekoppelt sind, wobei die Leitung an den Stationen nicht unterbrochen wird und daß die Übertragung in gleich langen oder unterschiedlich langen, in der Hauptsenderichtung unmittelbar zeitlich aneinandergefügten Meldungen, die aus einem oder mehreren Datenpaketen bestehen, erfolgt, wobei die einzelnen, in einem Meldezyklus zusammengestellten Meldungsserien mit einer speziellen Startbitfolge von der Hauptstation am Anfang der Linie oder des geteilten Ringes eingeleitet werden. Der geteilte Ring entspricht funktionsmäßig weitgehend der Linie, wobei der zusätzliche Vorteil besteht, daß an der Hauptstation gleichzeitig das Leitungsende kontrolliert werden kann.The described disadvantages of the systems which have become known, such as the limited number of stations, the limited size or extent, the limited data transmission rate, the sensitivity against the failure of only one station of the entire network are avoided by the invention in that the stations with their transmitting and receiving devices passively connect to an almost arbitrarily long line in the form of a line or a split ring (see Fig. 1.) are loosely coupled from metallic conductors or a glass fiber, whereby the line is not interrupted at the stations and that the transmission takes place in messages of the same length or of different lengths, which are immediately temporally joined in the main transmission direction and consist of one or more data packets, the individual message series compiled in a message cycle with a special start bit sequence are initiated by the main station at the beginning of the line or the divided ring. In terms of function, the divided ring largely corresponds to the line, with the additional advantage that the line end can be checked at the main station at the same time.

Ein wesentliches Merkmal besteht darin, daß die Leitung an den Stationen nicht unterbrochen wird und somit das Netzwerk eine hohe Betriebssicherheit besitzt. Zwischen die Ankopplung für die Empfangseinrichtung und der für die Sendeeinrichtung ist eine Verzögerungsleitung geschaltet (s. Abb..2.). Der Ablauf eines Meldezyklus ist wie folgt : Von der Hautpstelle, die sich am Anfang der Linie befindet, wird in kurzer zeitlicher Folge jeweils eine Meldungsserie mit einer speziellen Startbitfolge eingeleitet, aus der der Bit- und Worttakt entnommen werden kann. An den Schluß der Startbitfolge wird das Meldungsendezeichen gesetzt und unmittelbar danach das weitere Aussenden von Impulsen abgebrochen. Diese Bitfolge durchläuft nun nacheinander die Stationen der Linie. Diejenigen Stationen, die eine Meldung zum Senden vorbereitet haben, erkennen die Zeichenfolge 1.-2, als Freizeichen:

  • 1. Wort:Meldungsende )
  • Sendepause ) Freizeichen
  • 2. Sendepause ) Freizeichen
An essential feature is that the line at the stations is not interrupted and the network therefore has a high level of operational security. A delay line is connected between the coupling for the receiving device and that for the transmitting device (see Fig. 2.). The sequence of a message cycle is as follows: From the main point, which is at the beginning of the line, a series of messages with a special start bit sequence is initiated in quick succession, from which the bit and word clock can be taken. At the end of the start bit sequence, the end-of-message character is set and the further transmission of pulses is stopped immediately thereafter. This bit sequence now runs through the stations of the line one after the other. Those stations that have prepared a message for transmission recognize the string 1-2 as dial tone:
  • 1st word: end of message)
  • Transmission pause) dial tone
  • 2nd transmission pause) dial tone

Diese Zeichenfolge ist gleichzeitig die Aufforderung zum Senden. Nach Erkennen dieses Freizeichens muß sofort in 2. eine Folge von Impulsen gesetzt werden, da andernfalls eine der nächsten Stationen das Freizeichen erkennt und ihrerseits mit dem Absetzen einer Meldung beginnt. Das Erkennen des Freizeichens durch mindestens ein Null-Bit im Anschluß an das Meldungsendezeichen und das Aussenden von L-Bits unmittelbar im Anschüß an das Meldungsendezeichen wird durch die Verzögerungsleitung ermöglicht, die wegen der Reaktionszeit der Aufprüflogik länger als ein Bit sein muß. - Mittels der Verzögerungsleitung in engen Zusammenarbeit von Empfangseinrichtung, Aufprüflogik und Sendeeinrichtung ist es möglich, daß die passiv an die Leitung angeschaltete Station das empfangene Freizeichen noch vor Verlassen des Stationsbereiches in ein Besetztzeichen wandeln kann und die vorbereitete Meldung unmittelbar danach ausgesand wird, um diese dann ihrerseits mit dem Freizeichen abzuschließen.This string is also the request to send. After recognizing this dialing tone, a sequence of pulses must be set immediately in 2., since otherwise one of the next stations recognizes the dialing tone and in turn begins to send a message. Recognizing the leisure time chens by at least one zero bit following the end of message character and the transmission of L bits immediately following the end of message character is made possible by the delay line, which must be longer than one bit due to the response time of the check logic. - By means of the delay line in close cooperation between the receiving device, the test logic and the transmitting device, it is possible that the station that is passively connected to the line can convert the received dial tone into a busy signal before leaving the station area and the prepared message is sent immediately afterwards so that it can be sent in turn to complete with the dial tone.

Die Vorteile dieser Lösung liegen vor allem in den nahezu bis an die physikalische Grenze ausnutzbaren Übertragungsraten des lokalen Netzes, der nicht begrenzten Stationszahl- nicht meldende Stationen belasten das Netz nicht - der praktisch nicht begrenzten Länge das lokalen Netzes und der hohen Sicherheit gegen Netzzusammenbruch bei Ausfall nur einer Stationdurch das passive Ankoppeln derselben an die Leitung.The advantages of this solution lie above all in the transmission rates of the local network that can be used almost to the physical limit, the unlimited number of stations - non-reporting stations do not burden the network - the practically unlimited length of the local network and the high security against network breakdown in the event of failure only one station by passive coupling of the same to the line.

Die in der Hauptsenderichtung zeitlich aneinandergefügten Meldungen breiten sich jeweils in Richtung beider Leitungsenden aus. Sie laufen einmal im zeitlichen Verband der Meldungsserie vorwärts in der Hauptsenderichtung und zum anderen zeitlich, durch die räumliche Ausdehnung bedingt, voneinander getrennt rückwärts in Richtung Hauptstation. Dadurch ist sichergestellt, daß alle Meldungen alle Stationen erreichen.The messages that are joined together in the main transmission direction spread in the direction of both line ends. On the one hand, they run forwards in the main transmission direction in the chronological order of the message series and, on the other hand, separated backwards in time towards the main station due to the spatial extent. This ensures that all messages reach all stations.

Bei ausgedehnten Netzen und größerer Dämpfung kann es erforderlich sein, daß Regeneratoren in den Leitungszug eingeschaltet werden. Um auch die Meldungen, die im Meldungszyklus von nächfolgenden Stationen für weiter vorn liegende Stationen bestimmtsind empfangen zu können, müssen die Regeneratoren ihre Wirkungsrichtung unmittelbar nach Passieren der Meldungsserie umkehren. Das Zurückschalten auf die Hauptsenderichtung erfolgt unmittelbar nach Eintreffen der nächsten Startbit /folge oder durch ein entsprechend vereinbartes Zeichen der letzten Meldestelle der Linie.In the case of extensive networks and greater attenuation, it may be necessary to connect regenerators to the cable run. To receive the messages that are determined in the message cycle of nächfolgenden stations earlier lying stations regenerators have to reverse their direction of action immediately after passing the message series. Switching back to the main transmission direction takes place immediately after the arrival of the next start bit / sequence or by means of a correspondingly agreed symbol of the last reporting point on the line.

Die Datenlinie oder der geteilte Ring können auch durch ein zweites, identisch aufgebautes, parallel verlegtes Kabel ergänzt werden, wobei das erste Kabel als Sende- und das zweite Kabel als Empfangskabel eingesetzt sind. Das bietet den Vorteil, daß alle für die Station bestimmten Meldungen der kompletten Meldungsserie entnommen werden können, die die Empfangsleitung durchläuft, wodurch eine bessere Wortsynchronisation und damit höhere Sicherheit der Datenübertragung gegeben ist. Die Empfangseinrichtung in der Sendeleitung hat lediglich die Aufgabe, im Bedarfsfall, d.h. bei einer vorbereiteten Meldung, das Freizeichen zu erkennen und den Befehl für das Senden des Besetztzeichens und das Senden der Meldung zu geben. Bei Störung eines Kabels kann der Betrieb über das ungestörte Kabel abgewickelt werden. Da nur relativ wenige aktive Einheiten den Leitungszug unterbrechen, können diese als Doppeleinheiten ausgeführt werden, um gegen den Ausfall des gesamten Netzes weitgehend gesichert zu sein, der durch den Ausfall aktiver Einheiten bewirkt werden würde. Durch einen Zeitvergleich der über das Empfangskabel und das Sendekabel zur Hauptstation laufenden Signale - die Regeneratoren des Sendekabels müssen in diesem Fall auf den Einkabelbetrieb, wie er beschrieben wurde, geschaltet werden - können fehlerhafte Meldestellen auch dann identifiziert werden, wenn die absendende Station nicht fehlerfrei im Datenpaket enthalten ist.The data line or the divided ring can also be supplemented by a second, identically constructed, parallel cable, the first cable being used as the transmitting cable and the second cable as the receiving cable. This offers the advantage that all messages intended for the station can be taken from the complete series of messages that the receive line traverses, which results in better word synchronization and thus higher data transmission security. The receiving device in the transmission line only has the task, if necessary, i.e. in the case of a prepared message, to recognize the dial tone and to give the command for sending the busy signal and sending the message. If a cable malfunctions, operation can be carried out via the undisturbed cable. Since only relatively few active units interrupt the cable run, they can be designed as double units in order to be largely protected against the failure of the entire network, which would be caused by the failure of active units. By comparing the time of the signals running via the receive cable and the send cable to the main station - the regenerators of the send cable must be switched to single-cable operation as described - faulty reporting points can be identified even if the sending station is not faultless in the Data packet is included.

Bei Ton- und Bewegtbildübertragung ist die synchrone Verarbeitung im gesamten lokalen Netz erforderlich.Diese kann erreicht werden, indem entweder ein geteilter Ring oder eine Doppelkabellinie gebildet wird und von der Hauptstation in den Pausen Bit- und Worttakt ausgesendet werden.In the case of sound and moving picture transmission, synchronous processing is required throughout the entire local network, which can be achieved by forming either a split ring or a double cable line and sending out the bit and word clocks from the main station during the breaks.

Wird der Netzaufbau mit Glasfasern vorgenommen, ergeben sich eine Reihe zusätzlicher Möglichkeiten: Für das Auskoppeln und das Einkoppeln sowie für die Verzögerungsleitung können vorteilhaft Bauteile der integrierten Optik eingesetzt werden, Hih-und Rückleitung der Linie können in einer Glasfaser über verschiedene Wellenlängen geführt werden. Die Erfindung sieht vor, daß ein voll synchronisiertes lokales Netz mit Glasfasern aus Bauteilen der integrierten Optik aufgebaut wird, wobei nur ein Sender existiert, nämlich die Hauptstation, die laufend Bitserien aussendet. In den Stationen wird aus dem Bitstrom ein Datenstrom, indem' L-Bits passieren dürfen und die Nullbits durch Löschen erzeugt werden, was z.B. in Bauteilen der integrierten Optik durch Drehen der Polarisationsebene erreicht werden kann. Bei größeren lokalen Netzen müssen zusätzlich Regeneratoren in den Leitungszug eingefügt werden, die ebenfalls mit Impulssendern ausgestattet sind. Der Worttakt wird erfindungsgemäß dadurch übertragen, daß nach dem Aussenden vonz.B 16 Bits, die wie beschrieben verändert-werden können, von der Hauptstation ein nicht veränderbares Nullbit zur Kennzeichnung z.B. eines Doppelwortes hinzugefügt wird.Durch diese Maßnahme wird der Datendurchsatz nur unwesentlich reduziert, die gesamte Verarbeitung synchronisiert, stabilisiert und bes chleunigt.If the network is set up with glass fibers, there are a number of additional options: Components of the integrated optics can advantageously be used for coupling and coupling as well as for the delay line, Hi h and return lines of the line can be routed in a glass fiber over different wavelengths. The invention provides that a fully synchronized local network with glass fibers is built up from components of the integrated optics, with only one transmitter, namely the main station, which continuously sends out bit series. In the stations, the bit stream becomes a data stream in which 'L bits are allowed to pass through and the zero bits are generated by deletion, which can be achieved, for example, in components of the integrated optics by rotating the polarization plane. In the case of larger local networks, additional regenerators, which are also equipped with pulse transmitters, must be inserted in the cable run. The word clock is transmitted in accordance with the invention in that after the transmission of, for example, 16 bits, which can be changed as described, the main station adds an unchangeable zero bit for identifying, for example, a double word. This measure only slightly reduces the data throughput, the entire processing is synchronized, stabilized and accelerated.

Claims (9)

1. Lokales Netzwerk für die sehr schnelle Übertragung digitaler Daten beliebiger Quellen zwischen den Stationen des Netzwerkes dadurch gekennzeichnet, daß die Stationen mit ihren Sende- und Empfangseinrichtungen passiv an eine nahezu beliebig lange Leitung in Form einer Linie oder eines geteilten Ringes aus metallischen Leitern oder einer Glasfaser lose angekoppelt sind, wobei die Leitung an den Stationen nicht unterbrochen wird und daß die Übertragung in gleich langen oder unterschiedlich langen in der Hauptsenderichtung unmittelbar zeitlich aneinandergefügten Meldungen, die aus einem oder mehreren Datenpaketen besteht, erfolgt, wobei die einzelnen Meldungsserien mit einer speziellen Startbitfolge von der Hauptstation am Anfang der Linie oder des geteilten Ringes beginnen.1. Local network for the very fast transmission of digital data from any sources between the stations of the network, characterized in that the stations with their transmitting and receiving devices passively to an almost arbitrarily long line in the form of a line or a divided ring made of metallic conductors or one Glass fiber are loosely coupled, whereby the line is not interrupted at the stations and that the transmission takes place in the same length or different lengths of messages that are immediately temporally joined in the main transmission direction and consists of one or more data packets, with the individual message series having a special start bit sequence start from the main station at the beginning of the line or split ring. 2. Lokales Netzwerk nach Anspruch 1.dadurch gekennezeichnet, daß das passive Anschalten der Stationen mit ihren Aufgaben, Meldungen zu empfangen, das Ende einer in der Hauptsenderichtung vorbeilaufenden Meldungsserie zu erkennen, um ggf. eine vorbereitete Meldung nach Erkennen des Endes der Meldungsserie unmittelbar anzuhängen durch eine Verzögerungsleitung von der zeitlichen Länge von mehr als einem Bit oder einem Wellenzug, die zwischen die Ankoppelstelle für die Empfangseinrichtung und der für die Sendeeinrichtung geschaltet ist und beispielsweise durch eine Leitungsschleife gebildet wird, ermöglicht wird.2. Local network according to claim 1, characterized in that the passive switching on of the stations with their tasks of receiving messages recognizes the end of a series of messages passing in the main transmission direction, in order to append a prepared message after recognizing the end of the message series is made possible by a delay line with a length of more than one bit or a wave train, which is connected between the coupling point for the receiving device and that for the transmitting device and is formed, for example, by a line loop. 3. Lokales Netzwerk nach Anspruch 1.und2. dadurch gekennzeichnet, daß bei großer Ausdehnung des Netzes und der dadurch bedingten Dämpfung Verstärker oder Regeneratoren in den Leitungszug eingefügt werden, die jeweils nach Durchlaufen der Meldungsserie in der Hauptsenderichtung ihre Wirkungsrichtung umkehren und bei Beginn der nächsten von der Hauptstation ausgesandten Startbitfolge oder einem Meldungszyklusschlußzeichen der letzten Meldestelle wieder zurückschalten.3. Local network according to claim 1.und2. characterized in that in the case of large expansion of the network and the resulting attenuation, amplifiers or regenerators are inserted into the cable train, which reverse their direction of action after passing through the message series in the main transmission direction and at the start of the next start bit sequence sent by the main station or a message cycle end character of the last Switch the reporting point back down. 4. Lokales Netzwerk nach Ansprüchen 1. bis 3. dadurch gekennzeichent, daß die Datenlinie oder der geteilte Datenring aus zwei identisch aufgebauten, parallelen Leitungen, der Sende-und der Empfangsleitung gebildet wird, die an ihrem Ende miteinander verbunden sind, wobei an die Empfangsleitung an den Stationen jeweils eine zweite Empfangseinrichtung angeschaltet ist, über die alle für die Station bestimmten Datenpakete empfangen werden, und bei Störung nur einer Leitung kann der Betrieb des lokalen Netzwerkes über die nicht gestörte Leitung, wie in Ansprüchen 1. bis 3. beschrieben, erfolgen. 4th Local network according to Claims 1 to 3, characterized in that the data line or the divided data ring is formed from two identically constructed, parallel lines, the transmission line and the reception line, which are connected to one another at their ends, the reception line being connected to the Stations each have a second receiving device connected, via which all data packets intended for the station are received, and in the event of a fault in only one line, the operation of the local network can take place via the undisturbed line, as described in claims 1 to 3. 5. Lokales Netzwerk nach Ansprüchen 1. bis 4. dadurch gekennzeichnet, daß die Synchronisation des gesamten Netzes durch das Aussenden von Bittakt, Worttakt und dem Satztakt, der aus mehreren Worten besteht, von der Hautpstation dann immer vorgenommen wird, wenn die letzte Meldungsserie das Netz oder zumindest das Sendekabel verlassen hat.5. Local network according to claims 1 to 4, characterized in that the synchronization of the entire network by sending out bit clock, word clock and the sentence clock, which consists of several words, is always carried out by the main station when the last series of messages Has left the network or at least the transmission cable. 6. Lokales Netzwerk nach Ansprüchen 1. bis 5. dadurch gekennzeichnet, daß bei Einsatz von Glasfasern die Stationen mit Bauteilen der Integrierten Optik angekoppelt werden und daß das Aussenden von Daten indirekt dadurch geschieht, daß von der Hauptstation ein fortlaufender Strom von Impulsen ausgesendet wird, wobei dieser von der. aktuell meldenden Station durch Passierenlassen und Löschen in die gewünschte Datenbitfolge geändert wird.6. Local network according to claims 1 to 5, characterized in that when using glass fibers, the stations are coupled with components of the integrated optics and that the transmission of data occurs indirectly in that a continuous stream of pulses is emitted by the main station, whereby this of the. the station currently reporting is changed to the desired data bit sequence by passing it and deleting it. 7. Lokales Netzwerk nach Anspruch 6. dadurch gekennzeichnet, daß die Dauerimpulsserien der Hauptstation außer dem Bittakt den Worttakt oder Mehrfachworttakt übermitteln, indem z.B. nach Aussenden von 16 ggf. zu verändernden Datenbits ein Null-Bit gesendet wird.Local network according to claim 6, characterized in that the continuous pulse series of the main station transmit the word clock or multiple word clock in addition to the bit clock, e.g. after sending out 16 data bits that may need to be changed, a zero bit is sent. 8. Lokales Netzwerk nach Ansprüchen 1. bis 6. dadurch gekennzeichnet, daß bei Auftauchen von Fehlern durch defekte Leitungsteile oder Stationen diese bei der aus zwei Leitungen bestehenden Linie oder dem geteilten Datenring durch Zeitvergleich der hin- und der rücklaufenden Signale an der Hauptstation geortet werden.8. Local network according to claims 1 to 6, characterized in that when errors occur due to defective line parts or stations, these are located in the line consisting of two lines or the shared data ring by time comparison of the incoming and outgoing signals at the main station . 9. Lokales Netzwerk nach Ansprüchen 1. bis 8. dadurch gekennzeichnet, daß die Betriebssicherheit des Netzes erhöht wird, indem Hauptstation, Verstärker und Regeneratoren als Doppeleinheiten ausgeführt werden und die Regeneratoren durch zusätzliche Leitungen mit Bypass-Charakter verbunden werden.9. Local network according to claims 1 to 8, characterized in that the operational reliability of the network is increased by the main station, amplifiers and regenerators are designed as double units and the regenerators are connected by additional lines with a bypass character.
EP19830104781 1982-05-14 1983-05-14 Local area network for high transmission rates Expired EP0094660B1 (en)

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DE19823218146 DE3218146A1 (en) 1982-05-14 1982-05-14 LOCAL NETWORK FOR HIGH TRANSMISSION RATES

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CN112286087A (en) * 2018-05-28 2021-01-29 蓝箭航天技术有限公司 Carrier rocket measurement system
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US8189503B2 (en) 2000-04-07 2012-05-29 Stragent, Llc Systems and methods for packaging and distributing information
US8560640B2 (en) 2000-04-07 2013-10-15 Stragent, Llc Systems and methods for packaging and distributing information
CN112286087A (en) * 2018-05-28 2021-01-29 蓝箭航天技术有限公司 Carrier rocket measurement system
US11780531B2 (en) 2019-10-26 2023-10-10 Massachusetts Institute Of Technology Methods and apparatus for reconfigurable autonomous vehicle

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